package com.zj.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zj.reggie.common.CustomException;
import com.zj.reggie.dto.DishDto;
import com.zj.reggie.dto.SetmealDto;
import com.zj.reggie.entity.Dish;
import com.zj.reggie.entity.DishFlavor;
import com.zj.reggie.entity.Setmeal;
import com.zj.reggie.entity.SetmealDish;
import com.zj.reggie.mapper.SetmealMapper;
import com.zj.reggie.service.SetmealDishService;
import com.zj.reggie.service.SetmealService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;
    @Autowired
    private SetmealService setmealService;
    /**
     * 新增套餐，同时保存套餐和菜品的关联关系
     * @param setmealDto
     */
    @Transactional
    public void saveWithDish(SetmealDto setmealDto){
        //保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        //保存套餐和菜品的关联信息，操作setmeal_dish，执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }

    /**
     * 套餐删除,同时需要删除套餐和餐品的关联数据
     * @param ids
     */
    @Override
    @Transactional
    public void deleteWithDish(List<Long> ids) {
        //查询套餐状态，确定是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper =new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);

        int count = this.count(queryWrapper);
        //如果不能删除，抛出业务异常
        if (count > 0){
            throw new CustomException("套餐正在售卖中，不能删除");
        }
        //如果可以删除，先删除套餐表中的数据
        this.removeByIds(ids);
        //删除关系表中的数据
        //delete from setmeal_dish where setmeal_id in(1,2,3)
        LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);
        setmealDishService.remove(lambdaQueryWrapper);

    }
    /**
     * 根据id查询套餐信息和对应的菜品信息
     * @param id
     * @return
     */
    @Override
    @Transactional
    public SetmealDto getByIdWithDish(Long id) {
        //查询套餐基本信息
        Setmeal setmeal = this.getById(id);

        SetmealDto setmealDto = new SetmealDto();
        BeanUtils.copyProperties(setmeal,setmealDto);

        //查询当前套餐的菜品信息
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,setmeal.getId());
        List<SetmealDish> dishes  = setmealDishService.list();
        setmealDto.setSetmealDishes(dishes);
        return setmealDto;
    }
    /**
     * 更新套餐，同时修改套餐和对应口味的关联信息
     * @param setmealDto
     */
    @Override
    @Transactional
    public void updateWithDish(SetmealDto setmealDto) {
        //更新套餐表
        this.updateById(setmealDto);
        //清除当前套餐对应菜品信息
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,setmealDto.getId());

        setmealDishService.remove(queryWrapper);
        //添加当前提交过来的菜品数据
        List<SetmealDish> dishes = setmealDto.getSetmealDishes();
        dishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        //保存菜品口味数据到菜品口味表 dish_flavor
        setmealDishService.saveBatch(dishes);
    }
    /**
     * 根据ids禁用
     * @param
     * @param ids
     */
    @Override
    public void updateStatus(Integer status,List<Long> ids) {

        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.in(ids !=null,Setmeal::getId,ids);
        //根据传入的id集合进行批量查询
        List<Setmeal> list = setmealService.list(queryWrapper);

        for (Setmeal setmeal : list) {
            if (setmeal != null){
                setmeal.setStatus(status);
                setmealService.updateById(setmeal);
            }
        }

    }


}
